Collins Chiemeke

Collins Chiemeke
Federal University, Otuoke | FUOTUOKE · Department of Physics

PhD Applied Gephysics
Working on predicting the probable effects of a damaging earthquake on a given site using VS30 analysis.

About

68
Publications
13,197
Reads
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68
Citations
Introduction
Dr Collins C. Chiemeke an Asso.Prof at Federal University Otuoke is a renowned seismologist that has worked extensively on near surface geophysical method, in the area of high resolution 2D and 3D seismic reflection. His research interest is also in the area of seismic refraction tomography, multichannel analysis of surface wave (MASW), 2D resistivity tomography and Thermal Resistivity . He has currently 61 publications to his credit. He has taught both at postgraduate and undergraduate level.
Additional affiliations
February 2017 - present
Federal University, Otuoke
Position
  • Professor (Associate)
Description
  • Reserach areas include seimic reflection, seismic refraction tomography, resistivity imaging and multichannel analysis of surface wave, as applied to oil and gas, geotechnical information and structural failure.
October 2012 - January 2017
Federal University, Otuoke
Position
  • Professor (Associate)
November 2006 - October 2012
Ahmadu Bello University
Position
  • Lecturer II
Description
  • Central Northern Nigeria.
Education
October 2007 - October 2010
Ahmadu Bello University
Field of study
  • Applied Geophysics

Publications

Publications (68)
Article
Full-text available
Most often, if the direction and rate of heat flow is not well established, it becomes very difficult to design an effective mechanism that will channel heat away from a buried pipeline and an electrical cable, or dissipate direct heat from the Sun intensity. This research work therefore, is aimed at studying the direction and rate of internal and...
Article
Full-text available
This research was carried out with the aim of using digitized topography information to study the natural drainage pattern that will in the long run assist in the design of a workable drainage system. The research was engendered by the incessant flood experience by Bayelsa state on a yearly basis and the urge to curb the menace impose by the flood....
Article
Full-text available
This research work was carried out with the aim of using average shear wave velocity of the top 30 m (Vs30), technique to categorize the soil, and ascertain the probable resistance or damage that the structure placed on it could suffer in the event of damaging earthquake. In a bid to achieve this, downhole seismic survey was carried out in eight bo...
Article
Full-text available
Thermal resistivity or conductivity is a measure of the ability of soil material to conduct or dissipate heat from the source to the environment. Different soil types are characterized with their diverse thermal resistivity and conductivity values, which also indicate its ability to dissipate heat generated by a pipeline or electrical cable. The ra...
Article
Full-text available
Thermal resistivity survey was recently carried out with the aim of ascertaining its response to different lithologies, degree of soil water content, and ambient soil temperature within a specified location. The methodology employed in the determination of soil thermal resistivity and soil water content involves measuring the rate of temperature ch...
Article
Full-text available
The essence of carrying out thermal resistivity survey is to measure the capacity of the ground to conduct or dissipate heat. However, most often, soil thermal resistivity are determined at a point or along straight line, where an electrical cable or a pipeline is to be laid; information regarding the thermal resistivity distribution of the adjoini...
Article
Full-text available
It has been established that ambient soil temperature influences the results of thermal resistivity survey measured at the same point, using the same equipment. Hence, the need to investigate how ambient soil temperature and atmospheric temperature varies with time is of utmost necessity. To achieve this, the temperature of a specific point in the...
Article
Full-text available
Comprehensive knowledge of soil thermal resistivity is important for the design and installation of buried pipeline and cables, as build up of heat within the vicinity of the buried pipeline could cause it to crack and rust, or the cable becomes overheated and melts. Hence, the aim of this research work is to examine the effect of soil ambient temp...
Article
Full-text available
Though major earthquake of large magnitude has not occurred in Nigeria from previous records, however, the incessant earth tremor currently being experienced within the central northern Nigeria basement complex whose cause is yet to be ascertained calls for concern. Hence, the need for site seismological evaluation and characterization becomes para...
Article
Full-text available
Downhole seismic survey stands as one of the best method for determining the velocity distribution within different lithological unit, and to infer the different lithology within these layers. The aim of this research work is to make use of downhole seismic method for site characterization, determination of velocity distribution and establishment o...
Article
1 Geo-electric and seismic refraction tomography were carried out to investigate the depth to basement complex in a confined area where there are serious limitations in spread length as a result of obstacles. The major instruments used for this survey where Terraloc Mark6 digital seismograph, sets of vertical geophones, SAS 4000 Terrameter and Elec...
Article
Full-text available
Multichannel analysis of surface waves (MASW) is widely used for the measurement of shear wave velocity and for geotechnical characterization of near surface material. It is also used for the evaluation of material properties, and material boundaries to identify different lithological units. Multichannel analysis of surface waves (MASW) was recentl...
Article
Full-text available
The aim of this research work is to evaluate the velocities distribution and lithological changes within the subsurface, necessary for site characterization at a construction site located in the oil rich Niger Delta of Southern Nigeria using downhole seismic method. The downhole seismic survey was carried out with an offset distance of 3 m, at an i...
Conference Paper
Full-text available
The relationship between the direction of flow of surface and underground water has not been well established. Knowledge of this relationship is very necessary to determine how underground aquifers are formed. The aim of this work is to Examine and establish the relationship between the direction of flow of surface and underground water. The questi...
Article
Full-text available
The relationship between the direction of flow of surface and underground water has not been well established. Knowledge of this relationship is very necessary to determine how underground aquifers are formed. The aim of this work is to Examine and establish the relationship between the direction of flow of surface and underground water. The questi...
Article
Full-text available
Although the surface wave can serve a very useful purpose if adequately utilized to infer near surface information making use of the Multichannel Analysis of Surface Wave (MASW), it can also constitute serious menace to the entire body wave seismic data during acquisition and processing, if there is no deliberate plan to remove it during data acqui...
Presentation
Full-text available
The workshop is all about the application of already established principles of Geophysics.
Article
Full-text available
Structural failure of office complex floor has recently occurred in isolated places at different time within the offices of Federal University Otuoke. Speculation off the possible causes has been attributed to poor construction work, while others have associated it to the underlying geology; a few attributed the cause to the recent earth tremors th...
Conference Paper
Full-text available
The need to evaluate and understand the natural drainage pattern in a flood prone, and fast developing environment is of paramount importance. This information will go a long way to help the town planners to determine the drainage pattern, road networks and areas where prominent structures are to be located. This research work was carried out with...
Article
Full-text available
The structural complexity within the basement complex of Zaria batholith makes refraction survey and interpretation a very difficult task. Assignment of picked travel time into different layers which is critical for refraction tomography inversion is almost impossible, because it is very difficult to determine when the refraction event becomes the...
Conference Paper
Full-text available
High resolution seismic method has recently been carried out in Otuoke and Its Environs with the aim of investigating the near surface geological structure and the determination of the lithology which is very crucial for infrastructural development. To achieve this, seismic tomography was used for the survey. The results revealed that, the thicknes...
Article
Full-text available
High resolution seismic method has recently been carried out in Otuoke and Its Environs with the aim of investigating the near surface geological structure and the determination of the lithology which is very crucial for infrastructural development. To achieve this, seismic tomography was used for the survey. The results revealed that, the thicknes...
Article
Full-text available
The relationship between p wave and s wave is dynamic, and it is majorly a function of terrain. Knowing the relationship between p wave and s waves for any particular terrain is of vital important for both seismic exploration and geotechnical analysis. The aim of this research work is to establish an absolute relationship between the p waves and s...
Article
Full-text available
The aim of this research work is to examine the extent to which joint inversion of Multichannel Analysis of Surface Wave (MASW) and High Resolution Seismic Reflection, could be used to delineate near surface structures and generate the very near surface velocity model, that is crucial for effective processing of reflection seismic data, using the s...
Article
Full-text available
Tomography is an imaging technique that makes use of a non destructive energy source to probe the sub surface and produce a tomogram which represents a model of the geologic structure that exists below the surface. The principles of tomography initially were applied in the medical field and in the recent times applied in global and exploration geop...
Research
Full-text available
This paper centers on the MASW. A process of making the surface wave previously considered as noise, very useful tool in delineating the near surface.
Article
Full-text available
Geoelectric soundings using the symmetric Schlumberger configuration were carried out to investigate the groundwater potential in fifteen communities of Kajuru local government area within the Northern Nigerian Basement Complex. The project employed the acquired vertical electrical soundings (VES) data and hydrogeophysical expression of structural...
Article
Full-text available
Regional and local flooding have always been a menace in Bayelsa state, this could well be attributed to poor knowledge and design of drainage system and erection of illegal structure across the water way. The aim of this study therefore, is to ascertain the natural drainage pattern that exit at Federal University Otuoke and its environs by taking...
Article
Full-text available
Geoelectric soundings using the symmetric Schlumberger configuration were carried out to investigate the groundwater potential in fifteen communities of Kajuru local government area within the Northern Nigerian Basement Complex. The project employed the acquired vertical electrical soundings (VES) data and hydrogeophysical expression of structural...
Book
Full-text available
This book on High Resolution 2D and 3D seismic reflection touches on the fundamentals of high resolution seismic reflection in the area of data acquisition, processing and interpretation. It is a book written out of field experience, with practical examples that will guide young seismologist who want to build career on seismology. The preliminary t...
Article
Full-text available
The study area is Zaria, located in the basement complex of northern Nigeria. The rock type forming the major part of the Zaria batholith is granite. This research work was carried out to compare the responses of seismic refraction tomography and resistivity tomography in the same geologic environment and under the same conditions. Hence, the choic...
Article
Full-text available
Multichannel Analysis of Surface Wave (MASW) seismic method is widely used in geotechnical engineering for the measurement of shear wave velocity and evaluation of material property. This method was recently conducted at a Dam site located in Zaria, within the basement complex of northern Nigeria. The aim of this experiment was to make use of the M...
Article
Full-text available
High resolution seismic reflection has recently been carried out on Zaria batholith, with the aim of characterizing the granitic Zaria batholiths in terms of its lithology. The geology of the area has revealed that the older granite outcrops in the vicinity of Zaria are exposures of a syntectonics to late-tectonic granite batholiths which intruded...
Article
Full-text available
The need to evaluate and understand the natural drainage pattern in a flood prone, and fast developing environment is of paramount importance. This information will go a long way to help the town planners to determine the drainage pattern, road networks and areas where prominent structures are to be located. This research work was carried out with...
Article
Full-text available
The type of method adopted for this research was the 1D electrical resistivity, using the GEOPULSE Tarrameter. A schlumberger configuration was carried out to map out the Geological features of the earth subsurface. Five profiles were carried out in the study area. Each profile, the layout geometry for the electrical resistivity were the normal sch...
Conference Paper
Full-text available
In exploration and engineering seismology, ground roll has been treated as the most troublesome noise, masking the useful body waves during data acquisition and processing. Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delinea...
Conference Paper
Full-text available
This research work was carried out to determine the extent to which a geophysical data could give similar results (anomalies) when reprocessed under the same condition. Hence seismic refraction tomography processing which depends on picked arrival times was carried out to ascertain this fact. Two different raw seismic data collected from two profil...
Article
Full-text available
A geophysical study was carried out using Electrical resistivity method to delineated the boundary between basement complex and sedimentary rocks in kakara village, kano state. This area marks a contact zone between basement complex of northern Nigeria and sedimentary rock of chad basin formation. Twenty four Vertical Electric Soundings (VES) ware...
Article
Full-text available
Zaria, where this Survey was carried out is located in the basement complex of North Central Nigeria. It consists of Precambrian rocks types made up of granite, gneisses and low grade metasediment. The gneiss and the low grade metasediment forms the country rock into which the granitic batholith intruded. This work is meant to examine the effective...
Conference Paper
Full-text available
Resistivity Tomography (Imaging) was carried out across failed boreholes to ascertain the causes of the failure, which before drilling were initially investigated using vertical electrical sounding (VES). Wenner Schlumberger method which has very good vertical and horizontal resolution was employed for the survey. In each case an electrode spacing...
Article
Full-text available
This research work was carried out to determine the extent to which a geophysical data could give similar results (anomalies) when reprocessed under the same condition. Hence seismic refraction tomography processing which depends on picked arrival times was carried out to ascertain this fact. The processing flow started from importing raw seismic d...
Conference Paper
Leachate plumes emanating from an old municipal waste disposal sites near residential quarters of Hayin dogo in the Samaru area of Zaria is suspected to be contaminating domestic wells in the vicinity. Remedial work of groundwater quality needs to understand the geological conditions. The seismic refraction tomography survey provides the solution t...
Conference Paper
Full-text available
Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delineate the very near surface structure and for proper static correction of reflection seismic data. This research was carried out with a bid to developing a technique that could...
Article
Full-text available
High resolution seismic reflection survey has recently been carried in Zaria, located in the basement complex of northern Nigeria. The geology of Zaria revealed that it is made up of Precambrian rocks that consist of granite that form the major part of the batholiths along with low grade meta-sediments and gneisses that constitute the country rock...
Article
Full-text available
The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...
Article
Shallow Seismic reflection survey was carried out in Zaria, located in the basement complex of central northern Nigeria, with the aim of characterising the granitic batholith. However, the effect of near surface material, which could make reflection events appear disjointed or deeper than they really are, could be enormous if not corrected for. Thi...
Article
Full-text available
2D Electrical Resistivity imaging survey was carried out at the Old Cemetery and Tsamiya waste disposal sites in Zaria metropolis over a period of ten months with a view to monitoring the migration of leachate plumes within the subsurface. The Abem Lund Imaging system with Terrameter SAS 4000 was used for the data acquisition and processing while t...
Article
Near surface high resolution 2-D seismic reflection survey was carried out along the Zaria batholith. Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneiss and Low-grade metasediments. The granitic Zaria batholith intruded the gneiss and metasediments which fo...
Conference Paper
Full-text available
The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...
Conference Paper
Full-text available
Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneisses and low grade meta-sediment. High resolution seismic reflection survey has recently been carried out in Zaria, to determine the AVO characteristic of the granitic batholith and the country rocks into whic...
Article
Full-text available
Seismic refraction is mostly used in geotechnical work to determine the velocity of the overburden and the refractor velocity. Roll along, in seismic refraction tomography, is important for three reasons. These are to increase the profile length beyond the distance dictated by the source and the instrument (number of receiver and cable length), to...
Conference Paper
Full-text available
The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...
Conference Paper
Full-text available
High resolution seismic reflection survey has recently been carried in Zaria, located in the basement complex of northern Nigeria. The geology of Zaria revealed that it is made up of Precambrian rocks that consist of granite that form the major part of the batholiths along with low grade meta-sediments and gneisses that constitute the country rock...
Article
Full-text available
3D seismic reflection survey was recently carried out within the Zaria area of the basement complex of northern Nigeria, in order to investigate the complexity of the subsurface features within the basement. The geology of the survey area was characterized by gneisses and low grade meta-sedimentary rocks that form the country rock into which the gr...
Article
Full-text available
Seismic refraction tomography is unique in the sense that shot are taken at every receiver position along the spread. In that way, it becomes possible to conduct both forward and reverse shooting simultaneously along the profile. Furthermore, every point within the subsurface along the profile is probed by both forward and reversed shots. This lead...
Article
Full-text available
Geo-electric and seismic refraction tomography were carried out to investigate the depth to basement complex in a confined area where there are serious limitations in spread length as a result of obstacles. The major instruments used for this survey where Terraloc Mark6 digital seismograph, sets of vertical geophones, SAS 4000 Terrameter and Electr...
Conference Paper
Full-text available
Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneisse and migmatite, with very thin overburden cover. The common depth point (CDP) seismic reflection method was employed for this survey. The receivers (geophones) were placed in a straight line at 1 m interval...
Article
Full-text available
Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. This technique was used to estimate the depth to the fresh basement, estimate thickness of the weathered basement and to determine the subsurface lithology within the Bas...
Article
Full-text available
Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. This technique was used to estimate the depth to the fresh basement, estimate thickness of the weathered basement and to determine the subsurface lithology within the Bas...
Conference Paper
Full-text available
Tomography is an imaging technique which generates a cross-sectional picture (a tomogram) of an object by utilizing the object’s response to the non destructive, probing energy of external sources. Seismic tomography makes use of the sources that generate seismic waves which probe a geological target of interest. The output of seismic tomography an...
Conference Paper
Full-text available
Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. Measurement of arrival times for each shot, at each receiver position, results in a network of overlapping raypaths which can then be used to model the velocity profile....
Conference Paper
Full-text available
Refraction tomography relies on the travel times of seismic energy recorded at the surface by multiple receivers from many sources to generate an optimized model of the distribution of seismic velocities in the subsurface. This velocity model can be used to map subsurface features having sufficient differences in elastic properties. The methodology...
Conference Paper
Full-text available
A moderate earthquake of magnitude MS=5.9 occurred on 7 September 1999 south of the mountain Parnitha, in the vicinity of the city of Athens. During the analysis of the aftershocks, that were recorded and located by a temporary network installed by the University of Athens, the existence of shear-wave splitting was revealed and attributed to the pr...
Article
Full-text available
Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delineate the very near surface structure and for proper static correction of reflection seismic data. This research was carried out with a bid to developing a technique that could...
Article
Full-text available
Zaria area forms part of the Precambrian basement complex of north central Nigeria, which comprises Precambrian rocks made up of granite, gneisses and low grade metasediment. High resolution seismic reflection survey was carried out in Zaria to determine the AVO characteristic of the granitic batholith and the country rocks into which the batholith...

Questions

Question (1)
Question
The density of ray path coverage through a particular point in the subsurface is directly related to the accuracy of the predicted velocity; thus, the bottom and edges of a particular velocity model are generally the least accurate.

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